Fig. 4
From: Performance of typical structural components in basement-addition for existing building
Schematic Excavation process diagram: (a) excavation stage 1; (b) excavation stage 2; (c) excavation stage 3; (d) excavation stage 4; (e) excavation stage 5; (f) excavation stage 6; (g) excavation stage 7; (h) excavation stage 8.
